Molding-machine.



w. 0. SWIFT.

MOLDING MACHINE.

APPLICATION FILED MAB..7, 1904.

Patented Jan. 19; 1909.

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Patented Jan. 19, 1909.

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MOLDING MACHINE.

APPLICATION FILED Mum. 1904.

910,028. Patented J an. 19. 1909.

3 SHEETS-SHEET 3.

WILLIS C. SWIFT, OF OHAPPAQUA, NEW YORK.

MOLDING-MACHINE Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed March 7, 1904. Serial No. 196,799.

To all whom it may concern:

Be it known that I, WVILLIs C. SWIFT, a citizen of the United States,residing at Chappaqua, in the county of Vestchester and State of NewYork, have invented a certain new and useful Improvement inMolding-Machines, of which the following is a specification.

My invention relates to molding machines, and has for its object toprovide a new and improved machine of this description.

My invention is illustrated in the accompanying drawings, wherein-Figure 1 is a plan view of one form of molding machine embodying myinvention; Fig. 2 is a sectional view on line 22, Fig. 1 Fig. 3 is aplan view showing a different construction; FigJl is a section on linel-A, Fig. 3; Fig. 5 is a view of one of the adjustable nuts for theactuating screw. Fig. 6 is a vertical section through a portion of thecasing, showing a modified construction. Fig. 7 is a plan view of thedevice shown in Fig. 6 with the top or cover of the casing removed.

Like letters refer to like parts throughout the several figures.

Referring now to Figs. 1 and 2, I have shown a sand molding machineconsisting of a casing, A, which is supported upon its bottom, and whichacts as the support for the stripping plate, 13, and the flask, B ith inthe casing, A, is a reciprocating pattern carrier, C, upon which ismounted the pattern, C This pattern carrier preferably engages the innerface of the casing around its periphery, such periphery being preferablysubstantially continuous. In these figures the casing is cylindrical,and the pattern carrier is prevented from rotating in any desired manneras by means of the spline, C It will be seen that this spline permitsthe free reciprocation of the pattern carrier, but prevents the rotationwithin the casing. The pattern carrier is reciprocated by means ofone-or more screws. As shown in Fig. 1, there is employed a centralshaft or screw, D, which engages threads associated with the patterncarrier. This screw rests at one end upon the bottom of the casing, A,and at the other end engages a piece or plate, E, located between theupper and lower parts of the pattern carrier. Means are associated withthe screw, D, for rotating it, the bearings for the screw being at theends thereof, as shown.

Some means is provided for adjusting the parts when the' threads of thescrew wear so as to take up this wear, and keep the pattern carrier inthe proper position and at the proper height. It will be seen, for example, that unless such an adjusting device is provided the patterncarrier will drop down slightly as the screw threads wear. As shown inFig. 2, this adjustment is secured by having the part of the patterncarrier provided with the threads separate from the remaining part, or,in other words, by providin a threaded nut, adjustably connected withthe bottom of the pattern carrier, as by means of the screws, C. Thisnut is preferably provided with a series of holes, C, for the screws, C,arranged at proper intervals. \Vhen it is desired to adjust the parts onaccount of the wear of the threads or for any other reason, the screwsor bolts, 0", are taken out and the nut, C given a partial rotation, theamount of rotation depending upon the amount of adj ustment required.The nut is then again fastened to the bottom of the pattern carrier bythe screws or bolts, C. It will thus be seen that any desired adjustmentcan be secured in this manner.

Connected at the lower end of the screw D is a power or a gearing wheel,D This wheel is contained within the casing, Above this wheel is locateda supporting piece, E which is held in position in any desired manner,as by a shoulder or the like, E on the inner face of the casing, A.Suitable supports, E are connected with this supporting piece and passthrough openings in the bottom, G, of the pat-tern carrier and act tosupport the piece or plate, E, upon which are supported the stools, E",which support the plate, E The plate or piece, E, preferably fits withinthe pattern carrier, and is provided with an upturned edge, E, so thatany sand or dirt which may drop into the casing will be collected by theplate E, and will thus be prevented from falling down into the operatingmechanism.

I prefer to provide some means for limiting the movement of the patterncarrier. Any suitable means for this purpose may be used. As hereinshown, an arm or projecting part, D is connected with the upper end ofthe screw so as to rot-ate therewith. The bottom of the pattern carrieris provided with a projection, C the parts being arranged so that whenthe pattern carrier reaches its maximum upward position the D connectedtherewith.

projection C engages the projection D and stops the further rotation ofthe screw. An operating device is provided on the outside 0 the casing,A, and a suitable connection with the screw D is made so that said screwmay be rotated. As herein shown, a shaft, D is located exterior to thecasing, and extends along the side thereof in a vertical position, saidshaft being provided with a gear, D which engages the gear'D This shaftmay be rotated in any desired manner, as, for example, by means of thehand wheel, Said hand wheel is preferably pivotally connected with theshaft so that it may be turned upon one side, as shown, and thus be outof the way of the flask.

Instead of employing a single central screw I may employ a series ofscrews located at various positions. One form of such a construction isshown in Figs. 3 and 4, wherein there is illustrated four screws, D;

Y the casing A being provided with projecting parts, A which extendoutwardly and form chambers or apartments for said screws. Thisconstruction is particularlyv adapted for large and heavy patterns. Inthis construction the pattern carrier is provided with projecting parts,G which project into the chambers formed by the portions A of thecasing, and the threaded nuts 0 are connected with these projectingparts and are similar to those shown in Fig. 2, so that properadjustment may be secured. The power or gear wheel, or other suitablepower transmitting device, D in this case is mounted within the casingand the shaft upon which it is mounted instead of being one of thescrews is a shaft F having one bearing in the bottom casing, and theother in the part or plate E, this plate being mounted nearer the bottomof the casing than is shown in Fig. 2. The screws D are each providedwith a gear D all of said gears D engaging the gear or power wheel D sothat a uniform movement of the screws is secured. The shaft D in thiscase is located in any convenient position, and is provided with asuitable hand wheel, crank or the like. I prefer to use the separateshaft as the power shaft, although one of the screws might be providedwith a proj ecting end and be used for this purpose. I prefer to provideeach of the screws, D, with the stopping device, consisting of theprojections D and C When a multiple screw machine is used I prefer toarrange means for preventing the dust, dirt or sand from coming intocontact with the screws. In Figs. 6 and 7 I have shown such aconstruction. In these figures I have simply illustrated one of theprojecting parts A of the casing with the screw D in position. In thisconstruction the plate E is provided with lugs or projections H whichextend through the openings into the projecting parts A The projectioncC on the pattern carrier C project through this opening communicatingwith the parts A of the casing and move up and down in this space as thepattern carrier is moved up and down. If this space is left open dirt ordust or sand which may drop through the stripping plate is apt to comeinto contact with the screws, and cause wearing and other evils. Inorder to prevent this I prefer to provide a dust excluding device forthese openings. This dust excluding device may be formed in any desiredmanner. As herein shown I have provided a curtain I of proper width toextend across this opening and attached to the pattern carrier O. Thiscurtain is preferably a thin leaf spring coiled on a revolving shaft Iso that it will be wound and unwound when the pattern carrier moves upand down. I also provide below the pattern carrier a similar curtainwhich is preferably carried by the pattern carrier, and connected to theplate E. It will be seen that by this means the opening leading from themain casing into the part A of the casing will be at all times closedregardless of the position of the pattern carrier, and hence the sandand dust and dirt are excluded from the screws. The upper curtain ispreferably made of spring steel and strong enough to exert some liftingpower as the pattern carrier moves upward. The lower curtain need nothave this spring effect. The casing is provided with slots I into whichthe edges of the dust excluding device project so as to prevent the dustfrom getting around these edges. When this construction is used theportions A of thecasing are preferably provided with removable covers Jwhich are cut away to receive the upper curtain roll. These covers haveopenings for the ends of the screws, and act as bearings therefor.

InFigs. 6 and 7 a modified form of stopping device is illustrated. Inthese figures the stop arm D consists of an annular piece keyed to thescrew and provided with a suitable projection which engages theprojection C connected with the part C of the pattern carrier.

I have described in detail a certain construction embodying myinvention, but it is, of course, evident that the parts may be varied inmany particulars, and some of the parts omitted and others used withparts not herein shown without departing from the spirit of myinvention.

The use and operation of my invention are as follows: When the deviceshown in Fig. l is used the flask is placed in position and the patterncarrier will be in its lowered position with a suitable pattern thereon.The hand wheel D is then moved to a horizontal position and rotated.This rotates the shaft D which by means of the gears D and D rotates thescrew D. This screw by means of its engagement with the nut C attachedto the bottom of the pattern carrier moves said pattern carrierupwardly. hen the pattern carrier has moved upwardly a sufficientdistance the projection C engages the projection D and further movementof the pattern is prevented. These parts are arranged so that thepattern is in its operative position when said parts engage and themovement is stopped, that is, the pattern projects through the openingin the stripping plate so as to project into the flask the properamount. The sand is now placed in the flask and properly rammed. \Vhenit is desired to withdraw the pattern from the sand, the hand wheel isturned in the opposite direction. This causes the power transmittingdevice and the screw to rotate in such a manner as to lower the patterncarrier, which in turn moves the pattern downwardly through the openingin the stripping plate, and out of the sand, such sand being supportedby the stripping and stool plates during this movement.

It will be seen that by means of this construction a slow and perfectlysteady and sure movement of the pattern carrier is obtained during thewithdrawal of the pattern from the sand, and thus uniform andsatisfactory results may be secured. It will further be seen that theparts are substantially all inclosed in the casing A, and that the sandwhich may escape from the flask is prevented from coming in contact withthe mechanism because of the intervening plate or partition E. Thisplate in addition to keeping the sand out of the screw and othermechanism provides a bearing for the shaft of the power wheel or gear Dand also acts as a stool plate, and when a central screw is used holdsthe screw down and keeps it in its proper position. hen the pattern isvery heavy, or a shorter machine is desired, instead of using thecentral screw I may use a series of screws as shown in Figs. 3 and l,and connect them by some suitable mechanism so that they will rotate inunison.

I claim:

1. A molding machine comprising an exterior protecting easing, withinwhich the operating mechanism is contained and open at one end, a flaskmounted thereon so as to cover the open end of the casing, areciprocating pattern carrier mounted within said casing, means forreciprocating the carrier comprising a vertical screw connected with thepattern carrier, a power wheel within the casing, a connection betweensaid power wheel and said screw or screws, and a stop device comprisinga fixed part and a rotating part adapted when brought into contact tostop the carrier at a predetermined point.

2. A molding machine comprising a cas ing, a pattern carrier, a rotatingpart in the casing below the pattern carrier having a connection withthe pattern carrier, an intermediate part or plate extending across thepattern carrie" and acting as a barrier to prevent sand from fallingupon the pattern carrier and its connections, and a bearing associatedwith the plate for the shaft of the rotating part.

3. A molding machine comprising an exterior -asing, a tlask mountedthereon, a pattern carrier within said casing, a horizontal partitionextending across the casing and dividing it into two chambers, a powertransmitting device in one of said chambers, and a connection betweensaid power transmitting device and said pattern carrier said partitionprotecting the power transmitting device and its connections fromfalling sand.

-l. A molding machine comprising a support, a pattern carrier mountedthereon, a vertical screw-threaded shaft associated with said patterncarrier, a threaded nut rotatably set in said carrier and removablyfastened thereto, and through which said shaft passes, said threaded nutadjustably connecting the shaft with the pat-tern carrier so as to varythe limit of motion of the carrier, and a holding part passing throughsaid carrier and said nut so as to positively lock them together.

A molding machine comprising a casing provided with a bottom-piece, apattern carrier mounted in said casing, a rotating device within thecasing mounted so as to bear upon the bottom thereof, and a connectioncomprising a rotating shaft, and means for holding the same fromvertical movement, said shaft fixed to said rotating device so as torotate therewith.

G. A molding machine comprising a casing having a series of sectionscommunicating with each other, a pattern carrier in one section, anactuating part therefor in another section, a connection between theactuating part and the pattern carrier and a movable dust excludingdevice between the two sections.

7. A molding machine comprising a casing provided with a series ofextensions, a pattern carrier mounted in said casing, actuating devicestherefor located in said extensions, a suitable connection between thepattern carrier and said actuating devices, and a movable dust excludingdevice associated with each extension so as to separate it from the maincasing.

8. A molding machine comprising a casing, a flask mounted thereon, areciprocating pattern carrier in said casing, a series of extensions tosaid casing, actuating devices for the pattern carrier located in saidextensions, a connection between the pattern carrier and said actuatingdevices, and a flexible dust excluding curtain extending across theopening leading from each of said extensions to the main casing, saidcurtain mounted so as to be expanded and contracted as the patterncarrier is moved up and down.

9. A molding machine comprising a frame with a series of sections, apattern carrier between said sections, an actuating part for saidpattern carrier in each of said sections, a connection between each ofthe actuating parts and the pattern carrier, and a movable dustexcluding device associated with each of said sections.

10. A molding machine comprising a casing, a pattern carrier, operatingmechanism therefor at the bottom of the casing, and a stationaryprotecting device between the pattern carrier and said mechanism forpreventing sand from falling thereon.

11. A molding machine comprising a casing, a pattern carrier mountedtherein, a gear wheel near the bottom of said casing and parallelthereto, and a plate extending across the casing between the patterncarrier and said gear wheel and arranged to prevent the sand fromfalling on the gear wheel, a series of fixed supports from said plate.

12. A molding machine comprising a casing, a pattern carrier mountedtherein comprising two parts adapted to move together in the directionof the length of said casing and with a space between them, and astationary plate between said parts and adapted to catch any sand thatmay fall into said space.

WILLIS G. SWIFT. Witnesses:

HOMER L. KRAFT, EDWARD T. lVRAY.

